Messages in this thread Patch in this message |  | | | Date | Wed, 16 Dec 2009 18:04:31 +0100 | | From | Peter Zijlstra <> | | Subject | [PATCH 01/12] sched: Mark boot-cpu active before smp_init() |
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A UP machine has 1 active cpu, not having the boot-cpu in the active map when starting the scheduler confuses things.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> --- Index: linux-2.6/init/main.c =================================================================== --- linux-2.6.orig/init/main.c +++ linux-2.6/init/main.c @@ -369,12 +369,6 @@ static void __init smp_init(void) { unsigned int cpu; - /* - * Set up the current CPU as possible to migrate to. - * The other ones will be done by cpu_up/cpu_down() - */ - set_cpu_active(smp_processor_id(), true); - /* FIXME: This should be done in userspace --RR */ for_each_present_cpu(cpu) { if (num_online_cpus() >= setup_max_cpus) @@ -486,6 +480,7 @@ static void __init boot_cpu_init(void) int cpu = smp_processor_id(); /* Mark the boot cpu "present", "online" etc for SMP and UP case */ set_cpu_online(cpu, true); + set_cpu_active(cpu, true); set_cpu_present(cpu, true); set_cpu_possible(cpu, true); } --
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